For evidence, look no further than the hottest Twitter feed of the moment, @BrandsSayingBae, which (as of this writing) is approaching 10,000 followers in just two days and has generated the attention of everyone from The Verge to Time.

The examples are (so far as tweets go) relatively dated, with examples dating all the way back to March and April, when I'd argue that "bae" was considerably more novel. It's hard to call this trend an epidemic when you have to reach back nearly a year to stock your first few dozen examples, but perhaps the intent was to lay a historical foundation.